/* $OpenBSD: v3_akey.c,v 1.22 2019/04/22 17:10:01 tb Exp $ */ /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL * project 1999. */ /* ==================================================================== * Copyright (c) 1999 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * licensing@OpenSSL.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ #include #include #include #include #include #include #include static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist); static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values); const X509V3_EXT_METHOD v3_akey_id = { .ext_nid = NID_authority_key_identifier, .ext_flags = X509V3_EXT_MULTILINE, .it = &AUTHORITY_KEYID_it, .ext_new = NULL, .ext_free = NULL, .d2i = NULL, .i2d = NULL, .i2s = NULL, .s2i = NULL, .i2v = (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID, .v2i = (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID, .i2r = NULL, .r2i = NULL, .usr_data = NULL, }; static STACK_OF(CONF_VALUE) * i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist) { STACK_OF(CONF_VALUE) *free_extlist = NULL; char *tmpstr = NULL; if (extlist == NULL) { if ((free_extlist = extlist = sk_CONF_VALUE_new_null()) == NULL) return NULL; } if (akeyid->keyid != NULL) { if ((tmpstr = hex_to_string(akeyid->keyid->data, akeyid->keyid->length)) == NULL) goto err; if (!X509V3_add_value("keyid", tmpstr, &extlist)) goto err; free(tmpstr); tmpstr = NULL; } if (akeyid->issuer != NULL) { if ((extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist)) == NULL) goto err; } if (akeyid->serial != NULL) { if ((tmpstr = hex_to_string(akeyid->serial->data, akeyid->serial->length)) == NULL) goto err; if (!X509V3_add_value("serial", tmpstr, &extlist)) goto err; free(tmpstr); tmpstr = NULL; } if (sk_CONF_VALUE_num(extlist) <= 0) goto err; return extlist; err: free(tmpstr); sk_CONF_VALUE_pop_free(free_extlist, X509V3_conf_free); return NULL; } /* * Currently two options: * keyid: use the issuers subject keyid, the value 'always' means its is * an error if the issuer certificate doesn't have a key id. * issuer: use the issuers cert issuer and serial number. The default is * to only use this if keyid is not present. With the option 'always' * this is always included. */ static AUTHORITY_KEYID * v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values) { char keyid = 0, issuer = 0; int i; CONF_VALUE *cnf; ASN1_OCTET_STRING *ikeyid = NULL; X509_NAME *isname = NULL; STACK_OF(GENERAL_NAME) *gens = NULL; GENERAL_NAME *gen = NULL; ASN1_INTEGER *serial = NULL; X509_EXTENSION *ext; X509 *cert; AUTHORITY_KEYID *akeyid = NULL; for (i = 0; i < sk_CONF_VALUE_num(values); i++) { cnf = sk_CONF_VALUE_value(values, i); if (!strcmp(cnf->name, "keyid")) { keyid = 1; if (cnf->value && !strcmp(cnf->value, "always")) keyid = 2; } else if (!strcmp(cnf->name, "issuer")) { issuer = 1; if (cnf->value && !strcmp(cnf->value, "always")) issuer = 2; } else { X509V3error(X509V3_R_UNKNOWN_OPTION); ERR_asprintf_error_data("name=%s", cnf->name); return NULL; } } if (!ctx || !ctx->issuer_cert) { if (ctx && (ctx->flags == CTX_TEST)) return AUTHORITY_KEYID_new(); X509V3error(X509V3_R_NO_ISSUER_CERTIFICATE); return NULL; } cert = ctx->issuer_cert; if (keyid) { i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1); if ((i >= 0) && (ext = X509_get_ext(cert, i))) ikeyid = X509V3_EXT_d2i(ext); if (keyid == 2 && !ikeyid) { X509V3error(X509V3_R_UNABLE_TO_GET_ISSUER_KEYID); return NULL; } } if ((issuer && !ikeyid) || (issuer == 2)) { isname = X509_NAME_dup(X509_get_issuer_name(cert)); serial = ASN1_INTEGER_dup(X509_get_serialNumber(cert)); if (!isname || !serial) { X509V3error(X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); goto err; } } if (!(akeyid = AUTHORITY_KEYID_new())) goto err; if (isname) { if (!(gens = sk_GENERAL_NAME_new_null()) || !(gen = GENERAL_NAME_new()) || !sk_GENERAL_NAME_push(gens, gen)) { X509V3error(ERR_R_MALLOC_FAILURE); goto err; } gen->type = GEN_DIRNAME; gen->d.dirn = isname; } akeyid->issuer = gens; akeyid->serial = serial; akeyid->keyid = ikeyid; return akeyid; err: AUTHORITY_KEYID_free(akeyid); GENERAL_NAME_free(gen); sk_GENERAL_NAME_free(gens); X509_NAME_free(isname); ASN1_INTEGER_free(serial); ASN1_OCTET_STRING_free(ikeyid); return NULL; }